Towel bar



FIG. 1 is a perspective view of the towel bar of my new design;

FIG. 2 is a right side view, the left side being the reverse of the view shown;

FIG. 3 is a top view;

FIG. 4 is a front view;

FIG. 5 is a bottom view; and,

FIG. 6 is a rear view. 

The ornamental design for a towel bar, as shown and described. 